SDR AALA20150223005

Service difficulty report · O-Ring · Boeing 767323

Difficulty date: February 21, 2015
Submitted: February 25, 2015
Operation: Air carrier
Aircraft: N371AA
Make and model: Boeing 767323
Aircraft serial: 25198
Aircraft time: 93,349 hours, 14,833 cycles
System (JASC): 2910 · Hydraulic System, Main
Part: O-Ring
Condition: Torn
Location: Hydraulic Sys
Stage of operation: DE
How discovered: O
Nature of condition: K, J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

EMERGENCY DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. AT TOP OF DESCENT RECEIVED, C HYD QTY EICAS MSG. QTY CONTINUED TO DECREASE TO .15 DURING FINAL APPROACH. PRESS NEVER INDICATED LOW. FOUND LEAK AT CTR HYD SYS CASE DRAIN DIFFERENTIAL PRESS INDICATOR AT PRESSURIZATION MODULE DUE TO TORN O RING. R & R INDICATOR IAW AMM 29-11-19. PERFORMED LEAK & OPERATIONAL CHECKS. SYSTEM CHECKED NORMAL.